Filling stop motion for looms



Nov. 17, 1931. E. n. M ARTHUR FILLING STOP MOTION FOR LOOMS 3Sheets-Sheet 1 Filed June 5, 1930 Nov. 17, 1 931. MacARTHUR 1,832,567

FILLING STOP MOTION FOR LOOMS Filed June 5, 1930 I5 Sheets-Sheet 2EVE/V72? fZ 1///\/ E WC/fiWW/F MM+M Nov. 17, 1931. E. D. MacARTHUR1,832,567

FILLING STOP MOTION FOR LOOMS Filed June 5, 1950 I5 Sheets-Sheet 3FOP/V533;

Patented Nov. l7, 1931 orrice ELVIN n. MACARTHUR, or OLD HICKORY,TENNESSEE, AssIGNoR To CROMPTON a.

KNOWLES LOOM won-Ks, or wononisrnn, MASSACHUSETTS, A ooaronarron or madeemploy a shield normally held out of shielding position with respect tothe dagger MASSACHUSETTS FILLING STGP MOTION FOR LOOMS Application filed.Tune 5, 1930. Serial No. 459,352.

This invention relates to filling stop motions of the center type forlooms and it is the general object of the invention to improve motionsof this type so that the loom may be i stopped if parts of themotionrbreak even though perfect picks of filling are laidby theshuttle.

Center filling stop motions as customarily but movable into shieldingposition prior to or at the time of starting the loom after co'rrectinga mis-pick resulting from-faulty fill- 1ng. tions attending theCompletion of the picking out operation. C

hen a mis-pick occurs the weaver will reverse the pattern chain so as tocause a formation of sheds the reverseof those which preceded theoccurrence of the mis-p'ickQ When each shed is formed in this'reversingoperation the pick corresponding to it will be taken out and thisoperation will continue 4 until the defective pick is reached. Afterthelatter has been removed there remains in the next shed a perfect pick,and'with the shed open corresponding to this pick the weaver can do oneof two things, either remove the pick and throw the correspondingshuttle through by hand, or leave the old pick in place and avoidhandling the shuttle. In the first case the pick laid by the handpropelled shuttle would hold the filling fork raised so A that poweroperation of the loom could conshuttle by hand. It is quicker to followthe second method and leave the perfect pick in the fell of the clothwithout handling the shuttle. 1

In this second method no filling is left v under the fork, havingpreviously been beaten into the cloth, and it is necessary to providesome means for permitting continued operation of the loom despite thefact thatthe fork will not be supported. This is accomplished by use ofthe aforesaid'shield which'acts to prevent the dagger from engagingknock-off The need for the shieldis due to condi-' devices, even thoughunsupported by Weft, thereby permitting the loom to be turned over bypower the first pick following completion of the pick-out.

In oneform of fillingstop motion the shield is held normally in raisedposition by a spring but is free to move by gravity to shieldingposition should the spring break. In other instances the shield isnormally held down by gravity and is raised by a spring when the shippershaftrocks, said latter shield, however, because of the fact that it isnormally down, being ineffective to stop the loom should its springbreak.

"Itis an important object of my present in ventlon to provide a shieldwhich is capable of assuming two extreme positions, one of which isshielding andthe other of which is non-shielding and is capable also ofass'um lngan intermediate position due to defective structure and "whenso placed requiring knooking-olf ofthe loom. Y

With these andother objects in view which will appear as the descriptionproceeds, my invention resides in the combination and arrange'ment ofparts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a" convenient embodiment of myinvention is set forth,

Fig.1 is an end elevation of a portion of the 100m having my inventionapplied there to, the breast beam and lay being in section,

Fig. 2 is an enlarged rear elevation taken in the direction of arrow 2,Fig. 1, V

Figs. 3 and 4 are vertical sections on lines- 33 and M, respectively, ofFig. 2,

Fig. 5 is an enlarged vertical section on line55ofF-ig.1,' f

Figs. 6, 7, 8 and 9 are operating views showing the shield andassociated parts in different positions, and

Fig. 10 is a diagrammatic- "View showing the positions the shieldassumes relatively to the path of the'dagger. I Q

Referring to Fig. 1, the loom frame-jhas pivoted therein a lay 21movable about a rocker shaft 22. A bracket 23 on the lay has afillingfork'24 pivoted in the upper part thereof from which depends a rod 25.The

latter is connected to a holder 26 supporting a dagger 27 and the latteris acted upon to rise normally by a weight 28 adjustable along a rod 29secured to the holder 26. A rod 30 moving about a fixed stud 31eccentric with respect to the axis of the lay acts during rearwardmovement of the latter to press upwardly on that part of the carrier 26behind the pivot 32 thereof so as to depress the dagger 27.

A shipper handle 33 is secured to a shipper shaft 34 rotatably mountedin the frame of the loom and connected to mechanism not shown so thatwhen said handle is moved to the left as viewed in Fig. 1 the loom willbe connected to its driving power, but when moved to the right loomstoppage will result.

A bracket is bolted to the rear of the breast beam and extendsdownwardly to support a stud 41 held fixed to the bracket by means of ascrew 42. The bracket has spaced wings 43 in which the shaft is mountedand between which lie the shield 44 and the knockoff element 45. Thelatter has an arm 46 cari ried by the hub 47 and positioned to engageupper cam face 48 of a finger 49 secured to the shipper shaft 34. Theknock-olf element is further provided with a notch 50 adapted forengagement with the forward end of the dagger 27. An upwardly extendingfinger 51 formed integral with the hub 47 engages a part of the bracket40 to limit left han d movement of the knock-off element around stud 41as viewed in Fig. 1. The usual means not shown may be employed to holdthe shipper handle in running position, so that the finger 49 actingthrough its cam face 48 will hold the knock-off element in the normalposition shown in full lines in Fig. 1 with the finger 51 against thebracket 40. When the knock-off element turns in clock-wise direction asviewed in Fig. 1 the arm 46 will exert a down ward pressure on thefinger 49 to rock the shipper shaft 34 in a clock-wise direction asviewed in Fig. 1 to stop the loom.

The matter thus far described, except the shield, is of commonconstruction and is substantially similar to what is known in the tradeas the #8 center stop motion and shown in United States patent toKnowles No. 376,776.

My invention relates more particularly to the form and operation of theshield 44 and in carrying my invention into effect I provide the hub ofsaid shield with a web 61 from which extends a pin or lug 62. The latteris adapted for engagement with a flat spring 63 secured by screw 64 to aholder 65 secured in fixed angular relation on the shipper shaft byscrew 66. The spring is comparatively weak but is sufiiciently strong tohold the shield in either of its extreme-positions to be described.

The web has extending therefrom a shielding flange 67 which overlaps thenotch 50 as shown clearly in Fig. 2, and is positioned for engagementwith the dagger 27. An important part of my invention relates to therelation of the flange 67 to the notch 50 and this relation might bestbe understood by explaining the operation of the parts alreadydescribed.

Under normal running conditions when there is no defect in the filling,the shipper handle will be in its extreme left position as viewed inFig. 1, with the rear end of spring 63 against pin or lug 62 to hold theshield raised against gravity in position to expose notch 50, as shownin Fig. 6. As weaving continues under these conditions presence offilling under the filling fork 24 will hold the front end of dagger 27below the notch 50 and the parts will remain in the position shown inFig. 6.

When a fault in the weft occurs, however, the dagger will be raised toenter notch 50 so that continued forward movement of the lay will rockthe knock-off element in the right hand direction around the shaft 41 asviewed in Fig. 6, thereby causing the arm 46 to move over the cam face48 as shown in Fig. 9 and cause a movement of linger 49 downwardly. Theeffect of this movement will be to stop the loom.

Stoppage of the loom causes a partial rotation of the shipper shaft tolower the spring 63 out of supporting relation with respect to the stud62, whereupon the shield will be free to drop by gravity. A subsequentrearward motion of the lay will move the dagger out of position where itmay exert any restraining force on the flange 67 and the shield willthen fall freely by gravity to the position shown in Fig. 7, the spring63 still being down.

When the shield is hanging freely by gravity as shown in Fig. 7 the stud62 is so placed with respect to the axis of shaft 41 that upwardmovement of the spring 63 will cause rotation of the shield in ananti-clockwise direction as viewed in Fig. 7 to move said shield to thetemporary position shown in Fig. 8.

The next forward beat of the lay will find the shielding fork 24unsupported, so that the dagger 27 moves to its up position where itwould ordinarily engage the notch 50. The flange 67, however, issufficiently high in its temporary position to engage the dagger anddeflect the same until the latter has reached a point such as shown inFig. 8. Further forward motion of the lay will turn the shield in aclockwise direction against the yielding action of spring 63 to theposition shown in Fig. 6, the spring 63 being of such strength as not toexert any material turning force on the shipper shaft while the shieldis being returned to normal position.

When the spring 63 slips the shield will move to its gravity heldposition shown in Fig. 7, and under these conditions it is desirable tostop the loom. The manner in which this is accomplished is set forthdiagrammatically in Fig. 10. The dagger in its normal forward movementwhen weft is present will follow the path indicated by solid line 7 Owhich passes below the notch 50. This path also is below the flange 67when the shield is in normal reset position as indicated in light dottedlines in Fig. 10,

but said path will cross the position occupied by the flange as shown indot and dash lines when the shield is in its right hand extreme positionpreparatory to restarting the loom after a pick-out. The path, however,lies above the dagger guiding flange 67 when the shield is hangingfreely by gravity, The dagger upon striking the top of the flange willbe prevented from moving along the normal path to clear the notch 50,and will be raised along the heavy dotted line to engage said notch androck the knock-off element to effect loom stoppage. The heavy dashesindicate the path followed by the dagger when weft is absent from theshed.

From a consideration of Fig. 10 it will be understood that the shieldassumes two extreme positions, the left hand being normal and the righthand being temporary, both of these positions being maintained by'thespring 63, and that said shield is capable of assuming an intermediatethird position by the action of gravity where the flange will be solocated as to require an upward deflection of thedagger 27 into stoppingrelation with respect to the notch 50.

From the foregoing it will be seen that I have provided a simple meansfor effecting loom stoppage if for any reason the shield is in abnormalgravity held position due to the fact that the shield when in suchposition requires the dagger to stop the loom, even though weft bepresent under fork 24. It will also be seen that the device disclosedherein operates to stop the loom as soon as any defect occurs in theyielding device which holds the shield in normal position.

Having thus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

1. In a filling stop motion for a loom hav ing a lay, a dagger on thelay, a knock-oif element to effect loom stoppage, a shield for theelement, means to hold the shield in either normal shielding ortemporary nonshielding position relatively to. the element, said shieldtending to move to a position 1ntermediate its said shielding andnon-shield ing positions, and a dagger guide on said shield positionedwhen the shield is in intermediate position to engage the dagger andguide the latter into coacting relation with.

the knock-oh element to stop the 160111.:

2. In a filling stop motion for a loom hav-i ing a lay, :a daggeroaths-lay, a. knock-off: element to effect loom stop-page, a shield forthe element, said shield being movable from normal non-shieldingposition through an intermediate position to temporary shieldingposition, means to hold the shield in either non shielding or shieldingposition, i said shield being acted on by a force independent of themeans to hold said shield in intermediate position, and a dagger guideon the shield, the guide and dagger being so related that when the sheldis in. intermediate positionsaid guidewill cause coaction of the daggerand element to stop the loom.

3. In a filling stop motion for a loom having a lay, a dagger on thelay, a knock-off element to effect loom stoppage, a shield for theelement, yielding means to hold the shield in either of two extremepositions, said shield ten-ding by gravity to assume a position of restbetween said extreme positions, and a guide on the shield positionedwhen held at rest by gravity to engage the dagger and cause the same toengage a knock-off element to stop the loom.

4. In a filling stop motion for a loom having a lay, a weft controldagger carried by the lay and moving through a prescribed path when weftis present, a knock-off element to efiect loom stoppage positioned forcooperation with the dagger when Weft is absent, and a shield for saidknock-off element, said shield capable of assuming three positionsrelatively to the path, the normal v non-shielding position being onthat side of the path'on which the knock-off element is located,thetemporary shielding position being across the path to deflect the daggerfrom engagement with the knock-off element, and the third positionintermediate the first two positions located on that side of the pathopposite the knock-0E element, the shield when in said third positionengaging the dagger to cause the same to move into operative relationwith respect to the knock-off element to stop the loom.

5. In a filling stop motion for a loom having a lay, a weft controlleddagger on the lay, a knock-off element to cooperate with the dagger andeffect loom stoppage, said daggernormally moving along a path when weftis present which is to one side of the knock-off element, a shieldcapable of assuming three positions of rest relatively to the path, andyielding means to hold said shield either normally on the same side ofthe path as the knock-off element is located or temporarily across saidpath, said shield falling by gravity when the yielding means falls to aposition below said path, the shield thereby being positioned to engagethe dag ger and cause the same to cooperate with the knock-off elementto stop the loom;

6. In a filling stop motion for a loom having a lay, a weft controlleddagger on the lay, a knock-off element to coact with the dagger toeffect loom stoppage, and a shield for said dagger to assume twopositions relatively to the knock-oil element in neither of which thedagger coacts with the knock-oil element when weft is present, and meansrendered effective by the shield when the latter is in a third positionbetween said two positions to cause coaction between the dagger andelement to stop the loom when weft is present.

In testimony whereof I have hereunto affixed my signature.

ELVIN D. MAGARTHUR.

